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Atari coding BBS
| Re: jsr (a0) from within vbl |
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Posted by: mikro
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Jul,24.2009-08:44
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just to clarify: not only "extraroutine" -- in your example you use a0 in "vbl", i.e. there should be something like this:
vbl: ; hooked at $70
move.l a0,-(sp)
[...all sorts of stuff] ; don't use anything other than a0!
move.l extraroutine,a0
jsr (a0) ; subroutine don't use anything other than a0!
movea.l (sp)+,a0
rte
btw you can use indirect jump, jsr ([extraroutine]), it's slower but spares that a0 reg.
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Topic
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Date
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jsr (a0) from within vbl
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Per Almered (XiA)
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Jul,23.2009-18:51
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Re: jsr (a0) from within vbl
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PeP
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Jul,23.2009-19:28
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Re: jsr (a0) from within vbl
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Per Almered (XiA)
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Jul,23.2009-21:38
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Re: jsr (a0) from within vbl
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PeP
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Jul,24.2009-01:46
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Re: jsr (a0) from within vbl
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Per Almered/XiA
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Jul,24.2009-06:39
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Re: jsr (a0) from within vbl
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mikro
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Jul,24.2009-08:40
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Re: jsr (a0) from within vbl
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mikro
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Jul,24.2009-08:44
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Re: jsr (a0) from within vbl
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Per Almered (XiA)
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Jul,24.2009-09:26
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Re: jsr (a0) from within vbl
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mikro
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Jul,24.2009-10:35
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Re: jsr (a0) from within vbl
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PeP
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Jul,24.2009-15:40
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Re: jsr (a0) from within vbl
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Per Almered (XiA)
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Jul,24.2009-22:13
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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